When does Jim Henson's Muppet Babies return?

Jim Henson's Muppet Babies aired from September 15, 1984, to November 2, 1991, on CBS. The show portrays childhood versions of the Muppets living together in a nursery under the care of a human woman identified only as Nanny. Nanny appears in almost every episode, but her face is never visible; only the babies' view of her skirt, purple sweater, and distinctive green and white striped socks is shown.